What statement best compares photosynthesis and cellular respiration? a. photosynthesis breaks down sugars to release energy, while cellular respiration stores energy as sugars. b. both photosynthesis and cellular respiration take place during the light and during the dark. c. both photosynthesis and cellular respiration break down sugars to release chemical energy. d. photosynthesis only takes place in the light, while cellular respiration takes place in the light and dark.

C. Photosynthesis only takes place in the light, while cellular respiration takes place in the light and dark.

Explanation:

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the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.